Bjarne Stroustrup: "it takes 10 to 15 years for the C++ committee to accept my ideas!"

I met C++ inventor, Bjarne Stroustrup. He talked about Concepts library (C++20). He mentioned it takes 10 to 15 years for the C++ committee to accept his ideas!

By the way, he looks like that inventor in the Back to the Future trilogy!

Me and the inventor of C++, Bjarne Stroustrup (at Shareworks by Morgan Stanley).